I have plans and buy a stereo encoder to my Max Pro 3.(Tired of mono sound now )
Today, I have a cable between the studio and the transmitter, it's at about 90meter long with RCA plug in the end. I don't have much noise and any another interference, only a bad soundcard.

Will it work fine with a stereoencoder then? (it is boring and buy something that will not work so well)

Maybe it's hard to answer?

I have put a file with this post with a record from my station, so you can hear.

And another question:
Today my setup is like this:
Computer -> Mixer -> Limbo 1 -> Back to mixer (amplifies the sound) -> To transmitter

When I set the Limbo with the transmitter, the sound is wery low. Remains: The cable is about 90meters long.( I got to much loss) But when I do it like this: Computer -> Mixer -> Limbo 1 -> Back to mixer (amplifies the sound) -> To transmitter, it works good.

If I buy a stereoencoder, Do I have an extra amplifier? Or have the stereoencoder higher volume than the RCA plug on the transmitter?

- It has balanced inputs, this way the noise from long cable is mostly eliminated
- It has the compressor part taken from Limbo I (that you seem to like and you should, it is nice)
- Its output volume is high and you will not need the amplifier anymore
- Its got very sharp analog filters, very good stereo separation
- Upgrade path to RDS assured, just plug in RDS daughter board (4000 mini)